COVER INFORMATION Station: VLBA_BR (Code Br ) Experiment: Parsec scale structure in ISM and the nature of 21-cm absorbers Exp. Code: GG074 Schedule Version: 1.00 Processed by SCHED version: 9.40 Release Jan. 13, 2011. PI: Neeraj Gupta Address: ASTRON Postbus 2 7990 AA Dwingeloo The Netherlands Phone: +31-521-595782 EMAIL: gupta@astron.nl Fax: Phone during observation: +31-521-595782 Observing mode: Notes: Concerning this schedule you can also contact Yurii Pidopryhora, pidopryhora@jive.nl, +31-521-596548 COVER LETTER: Block schedule quote: GG074 Eb Wb Jb1 On25 Mc Tr -- EVN Eu 159 1700(08/06)-0300(09/06) 21cm (1396.5 MHz) US 159 1700(08/06)-0500(09/06) VLBA Target: J1243+4043 Delay calibrator: J1242+3751 Bandpass claibrators/fringe-finders: 4C39.25, 3C345 WSRT calibrator: 3C286 In this experiment we observe an HI absorber (with z~0.0169) in front of a ~196 mJy quasar. The peak absorption is at ~1396.47 MHz, which is centered at one of the observation subbands (with 0 frequency offset). !!! PCAL is OFF for this experiment !!! Schedule for VLBA_BR (Code Br ) Page 2 Parsec scale structure in ISM and the nature of 21-cm absorbers UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2011 Day 159 --- Next scan frequencies: 1390.83 1390.83 1394.77 1394.77 1398.70 1398.70 1402.63 1402.63 Next BBC frequencies: 709.17 709.17 705.23 705.23 701.30 701.30 697.37 697.37 Next scan bandwidths: 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 19 04 50 4C39.25 04 13 22 34.8 68.1 -5.2 -52.8 0 0 19 04 45 19 09 50 --- 04 18 22 35.6 68.9 -5.2 -53.2 300 5 19 04 46 19 17 20 J1243+4043 04 25 54 11.4 39.5 -8.3 -34.1 391 5 19 17 15 19 28 50 --- 04 37 26 12.6 41.4 -8.1 -35.6 690 16 19 17 16 19 29 20 J1243+4043 04 37 56 12.7 41.4 -8.1 -35.6 24 16 19 29 15 19 40 50 --- 04 49 27 14.0 43.3 -7.9 -37.1 690 27 19 29 16 19 41 50 J1242+3751 04 50 28 11.9 45.4 -7.9 -36.9 48 27 19 41 45 19 43 50 =1240+381 04 52 28 12.2 45.7 -7.8 -37.2 120 29 19 41 46 19 44 50 J1243+4043 04 53 28 14.5 43.9 -7.9 -37.6 48 29 19 44 45 19 56 20 --- 05 05 00 15.8 45.7 -7.7 -39.0 690 41 19 44 46 19 56 50 J1243+4043 05 05 30 15.9 45.7 -7.6 -39.1 24 41 19 56 45 20 08 20 --- 05 17 02 17.3 47.5 -7.5 -40.4 690 52 19 56 46 20 09 20 J1242+3751 05 18 02 15.3 49.7 -7.4 -40.1 48 52 20 09 15 20 11 20 =1240+381 05 20 02 15.6 50.1 -7.4 -40.4 120 54 20 09 16 20 12 20 J1243+4043 05 21 03 17.8 48.1 -7.4 -40.9 48 54 20 12 15 20 23 50 --- 05 32 35 19.2 49.8 -7.2 -42.2 690 65 20 12 16 20 24 20 J1243+4043 05 33 05 19.3 49.9 -7.2 -42.3 24 65 20 24 15 20 35 50 --- 05 44 37 20.8 51.6 -7.0 -43.6 690 76 20 24 16 20 36 50 J1242+3751 05 45 37 18.9 54.0 -7.0 -43.1 48 76 20 36 45 20 38 50 =1240+381 05 47 37 19.2 54.3 -6.9 -43.3 120 78 20 36 46 20 39 50 J1243+4043 05 48 37 21.3 52.2 -6.9 -44.0 48 78 20 39 45 20 51 20 --- 06 00 09 22.8 53.9 -6.7 -45.3 690 89 20 39 46 20 51 50 J1243+4043 06 00 39 22.9 53.9 -6.7 -45.3 24 89 20 51 45 21 03 20 --- 06 12 11 24.5 55.6 -6.5 -46.6 690 101 20 51 46 Schedule for VLBA_BR (Code Br ) Page 3 Parsec scale structure in ISM and the nature of 21-cm absorbers UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2011 Day 159 --- 21 04 20 J1242+3751 06 13 11 22.8 58.2 -6.5 -45.8 48 101 21 04 15 21 06 20 =1240+381 06 15 12 23.0 58.5 -6.5 -46.0 120 103 21 04 16 21 07 20 J1243+4043 06 16 12 25.0 56.2 -6.5 -47.0 48 103 21 07 15 21 18 50 --- 06 27 44 26.6 57.8 -6.3 -48.1 690 114 21 07 16 21 19 20 J1243+4043 06 28 14 26.7 57.9 -6.3 -48.2 24 114 21 19 15 21 30 50 --- 06 39 46 28.3 59.5 -6.1 -49.3 690 125 21 19 16 21 31 50 J1242+3751 06 40 46 26.8 62.2 -6.0 -48.4 48 125 21 31 45 21 33 50 =1240+381 06 42 46 27.1 62.5 -6.0 -48.5 120 127 21 31 46 21 38 00 4C39.25 06 46 57 59.9 92.5 -2.7 -59.1 175 127 21 37 55 21 43 00 --- 06 51 58 60.7 93.5 -2.6 -59.0 300 132 21 37 56 21 47 10 J1243+4043 06 56 08 30.7 61.8 -5.8 -50.8 179 132 21 47 05 21 58 40 --- 07 07 40 32.4 63.4 -5.6 -51.9 690 143 21 47 06 21 59 10 J1243+4043 07 08 10 32.5 63.5 -5.6 -51.9 24 143 21 59 05 22 10 40 --- 07 19 42 34.2 65.1 -5.4 -52.9 690 154 21 59 06 22 11 40 J1242+3751 07 20 42 32.8 68.1 -5.4 -51.6 49 154 22 11 35 22 13 40 =1240+381 07 22 43 33.1 68.4 -5.3 -51.7 120 156 22 11 36 22 14 40 J1243+4043 07 23 43 34.9 65.6 -5.3 -53.3 49 156 22 14 35 22 26 10 --- 07 35 15 36.6 67.2 -5.2 -54.2 690 168 22 14 36 22 26 40 J1243+4043 07 35 45 36.7 67.3 -5.1 -54.3 24 168 22 26 35 22 38 10 --- 07 47 17 38.5 68.9 -5.0 -55.2 690 179 22 26 36 22 39 10 J1242+3751 07 48 17 37.1 72.1 -4.9 -53.5 49 179 22 39 05 22 41 10 =1240+381 07 50 17 37.4 72.4 -4.9 -53.6 120 181 22 39 06 22 42 10 J1243+4043 07 51 17 39.1 69.4 -4.9 -55.5 49 181 22 42 05 22 53 40 --- 08 02 49 40.9 71.0 -4.7 -56.3 690 192 22 42 06 22 54 10 J1243+4043 08 03 19 41.0 71.1 -4.7 -56.4 24 192 22 54 05 23 05 40 --- 08 14 51 42.8 72.7 -4.5 -57.2 690 203 22 54 06 23 06 40 J1242+3751 08 15 51 41.6 76.2 -4.5 -55.1 49 203 23 06 35 23 08 40 =1240+381 08 17 52 41.9 76.5 -4.4 -55.2 120 205 23 06 36 23 09 40 J1243+4043 08 18 52 43.5 73.3 -4.4 -57.4 49 205 23 09 35 23 21 10 --- 08 30 24 45.3 74.9 -4.2 -58.2 690 217 23 09 36 Schedule for VLBA_BR (Code Br ) Page 4 Parsec scale structure in ISM and the nature of 21-cm absorbers UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2011 Day 159 --- 23 21 40 J1243+4043 08 30 54 45.4 75.0 -4.2 -58.2 24 217 23 21 35 23 33 10 --- 08 42 26 47.3 76.6 -4.0 -58.9 690 228 23 21 36 23 34 10 J1242+3751 08 43 26 46.1 80.5 -4.0 -56.4 49 228 23 34 05 23 36 10 =1240+381 08 45 26 46.4 80.8 -4.0 -56.5 120 230 23 34 06 23 37 10 J1243+4043 08 46 26 47.9 77.2 -4.0 -59.1 49 230 23 37 05 23 48 40 --- 08 57 58 49.8 78.9 -3.8 -59.7 690 241 23 37 06 --- Start: Wed 8 Jun 2011 Day 159 -- Stop: Thu 9 Jun 2011 Day 160 --- 23 49 10 J1243+4043 08 58 28 49.9 79.0 -3.8 -59.7 24 241 23 49 05 00 00 40 --- 09 10 00 51.8 80.7 -3.6 -60.3 690 252 23 49 06 00 01 40 J1242+3751 09 11 00 50.6 85.0 -3.5 -57.3 49 252 00 01 35 00 03 40 =1240+381 09 13 01 51.0 85.3 -3.5 -57.3 120 254 00 01 36 00 04 40 J1243+4043 09 14 01 52.4 81.3 -3.5 -60.4 49 254 00 04 35 00 16 10 --- 09 25 33 54.3 83.1 -3.3 -60.9 690 265 00 04 36 00 16 40 J1243+4043 09 26 03 54.4 83.2 -3.3 -60.9 24 265 00 16 35 00 28 10 --- 09 37 35 56.3 85.0 -3.1 -61.2 690 277 00 16 36 00 29 10 J1242+3751 09 38 35 55.2 89.8 -3.1 -57.6 49 277 00 29 05 00 31 10 =1240+381 09 40 35 55.5 90.2 -3.0 -57.6 120 279 00 29 06 00 36 10 3C345 09 45 36 20.4 52.6 -7.0 -43.6 218 279 00 36 05 00 41 10 --- 09 50 37 21.1 53.3 -6.9 -44.1 300 284 00 36 06 00 46 10 J1243+4043 09 55 38 59.3 88.1 -2.8 -61.6 214 284 00 46 05 00 57 40 --- 10 07 10 61.3 90.2 -2.6 -61.6 690 295 00 46 06 00 58 10 J1243+4043 10 07 40 61.3 90.3 -2.6 -61.6 24 295 00 58 05 01 09 40 --- 10 19 12 63.3 92.6 -2.4 -61.5 690 306 00 58 06 01 10 40 J1242+3751 10 20 12 62.1 98.4 -2.4 -56.7 48 306 01 10 35 01 12 40 =1240+381 10 22 12 62.5 98.9 -2.4 -56.6 120 308 01 10 36 01 13 40 J1243+4043 10 23 12 63.9 93.4 -2.4 -61.5 48 308 01 13 35 01 25 10 --- 10 34 44 65.9 95.8 -2.2 -61.1 690 319 01 13 36 01 25 40 J1243+4043 10 35 14 65.9 96.0 -2.2 -61.1 24 319 01 25 35 01 37 10 --- 10 46 46 67.8 98.7 -2.0 -60.4 690 330 01 25 36 Schedule for VLBA_BR (Code Br ) Page 5 Parsec scale structure in ISM and the nature of 21-cm absorbers UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 9 Jun 2011 Day 160 --- 01 38 10 J1242+3751 10 47 46 66.6 105.5 -1.9 -54.5 47 330 01 38 05 01 40 10 =1240+381 10 49 47 67.0 106.1 -1.9 -54.2 120 332 01 38 06 01 46 10 J1243+4043 10 55 47 69.3 101.0 -1.8 -59.7 347 332 01 46 05 01 55 10 --- 11 04 49 70.8 103.6 -1.7 -58.8 540 341 01 46 06 01 55 40 J1243+4043 11 05 19 70.9 103.7 -1.7 -58.7 24 341 01 55 35 02 04 50 --- 11 14 31 72.4 106.7 -1.5 -57.5 550 350 01 55 36 02 05 50 J1242+3751 11 15 31 71.0 114.8 -1.5 -50.0 47 350 02 05 45 02 07 50 =1240+381 11 17 31 71.3 115.6 -1.4 -49.6 120 352 02 05 46 02 08 50 J1243+4043 11 18 31 73.0 108.0 -1.4 -56.8 46 352 02 08 45 02 17 20 --- 11 27 03 74.3 111.3 -1.3 -55.1 510 360 02 08 46 02 17 50 J1243+4043 11 27 33 74.4 111.5 -1.3 -55.0 24 360 02 17 45 02 26 20 --- 11 36 04 75.7 115.2 -1.1 -52.8 510 369 02 17 46 02 27 20 J1242+3751 11 37 04 74.1 124.5 -1.1 -44.1 46 369 02 27 15 02 29 20 =1240+381 11 39 05 74.4 125.5 -1.1 -43.4 120 371 02 27 16 02 30 20 J1243+4043 11 40 05 76.3 117.1 -1.1 -51.6 46 371 02 30 15 02 38 50 --- 11 48 36 77.6 121.7 -0.9 -48.5 510 379 02 30 16 02 39 20 J1243+4043 11 49 06 77.6 122.0 -0.9 -48.3 24 379 02 39 15 02 47 50 --- 11 57 38 78.8 127.5 -0.8 -44.3 510 387 02 39 16 02 48 50 J1242+3751 11 58 38 76.8 137.6 -0.7 -34.7 45 387 02 48 45 02 50 50 =1240+381 12 00 38 77.1 139.1 -0.7 -33.6 120 389 02 48 46 02 55 40 3C345 12 05 29 41.0 72.5 -4.6 -55.9 206 389 02 55 35 03 00 00 --- 12 09 50 41.7 73.1 -4.6 -56.2 260 394 02 55 36 03 02 30 J1243+4043 12 12 20 80.6 139.5 -0.5 -34.8 62 394 03 02 25 03 14 00 --- 12 23 52 81.7 151.9 -0.3 -24.5 690 405 03 02 26 03 14 30 J1243+4043 12 24 22 81.7 152.5 -0.3 -24.0 24 405 03 14 25 03 26 00 --- 12 35 54 82.4 167.6 -0.1 -10.9 690 416 03 14 26 03 26 50 J1242+3751 12 36 44 79.6 172.7 -0.1 -6.2 36 416 03 26 45 03 28 50 =1240+381 12 38 44 79.6 174.8 -0.1 -4.3 120 418 03 26 46 03 29 50 J1243+4043 12 39 45 82.5 173.1 -0.1 -6.1 46 418 03 29 45 03 41 20 --- 12 51 16 82.4 189.8 0.1 8.6 690 429 03 29 46 Schedule for VLBA_BR (Code Br ) Page 6 Parsec scale structure in ISM and the nature of 21-cm absorbers UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 9 Jun 2011 Day 160 --- 03 41 50 J1243+4043 12 51 46 82.4 190.5 0.1 9.3 24 429 03 41 45 03 53 20 --- 13 03 18 81.8 205.9 0.3 22.6 690 441 03 41 46 03 54 10 J1242+3751 13 04 09 79.0 201.9 0.3 18.4 36 441 03 54 05 03 56 10 =1240+381 13 06 09 78.9 203.9 0.4 20.0 120 443 03 54 06 03 57 10 J1243+4043 13 07 09 81.5 210.5 0.4 26.5 46 443 03 57 05 04 08 40 --- 13 18 41 80.4 222.4 0.6 36.4 690 454 03 57 06 04 09 10 J1243+4043 13 19 11 80.3 222.8 0.6 36.7 24 454 04 09 05 04 20 40 --- 13 30 43 78.9 232.1 0.8 44.0 690 465 04 09 06 04 21 30 J1242+3751 13 31 33 76.5 224.7 0.8 36.4 36 465 04 21 25 04 23 30 =1240+381 13 33 33 76.2 226.0 0.8 37.4 120 467 04 21 26 04 24 30 J1243+4043 13 34 34 78.4 234.7 0.8 45.9 46 467 04 24 25 04 36 00 --- 13 46 05 76.7 241.5 1.0 50.6 690 478 04 24 26 04 36 30 J1243+4043 13 46 35 76.7 241.7 1.0 50.8 24 478 04 36 25 04 48 00 --- 13 58 07 74.9 247.1 1.2 54.2 690 489 04 36 26 04 48 50 J1242+3751 13 58 58 72.8 240.0 1.3 47.0 37 489 04 48 45 04 50 50 =1240+381 14 00 58 72.5 240.9 1.3 47.5 120 491 04 48 46 04 55 10 3C345 14 05 19 60.7 91.7 -2.6 -60.3 145 491 04 55 05 05 00 00 --- 14 10 09 61.5 92.6 -2.6 -60.2 290 496 04 55 06 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: sess211.H128 Matching groups in /aps3/sched9.4/catalogs/freq.dat: v20cm_1 FD and KP filtered below 1330. SC filtered above 1440 Setup group: 14 Station: VLBA_BR Total bit rate: 128 Format: VLBA1:1 Bits per sample: 2 Sample rate: 8.000 Number of channels: 8 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 2100.00 2100.00 2100.00 2100.00 2100.00 2100.00 2100.00 2100.00 Net SB= U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= L L L L L L L L IF = A C A C A C A C VLBA FE= 20cm omit 20cm omit VLBA Synth= 15.4 2.1 15.4 The following frequency sets based on this setup were used. Frequency Set: 15 Based on FREQ, BW, and/or DOPPLER in schedule. Used pcal sets: 1 LO sum= 1390.83 1390.83 1394.77 1394.77 1398.70 1398.70 1402.63 1402.63 BBC fr= 709.17 709.17 705.23 705.23 701.30 701.30 697.37 697.37 Bandwd= 4.000 4.000 4.000 4.000 4.000 4.000 4.000 4.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = OFF PCALXB1= S1 S2 S3 S4 S5 S6 S7 S8 PCALXB2= M1 M2 M3 M4 M5 M6 M7 M8 PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 6, 10, 14, 18, 22, 26, 30 barrel=roll_off SOURCES USED IN RECORDING SCANS -- Parsec scale structure in ISM and the nature of 21-cm absorbers Catalog positions marked with *. Precession of date coordinates is based on stop time of first scan. Names used in schedule marked with *. Short names used in VLA and SNAP files marked with +. Observation date used in B1950/J2000 coordinate conversion (PRECDATE): 1979.900 No adjustments are made for rates (DRA, DDEC). Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * J1243+4043 12 41 32.734570 * 12 43 55.781600 12 44 29.987313 0.00 41 00 22.94680 * 40 43 58.43500 40 40 17.96403 0.00 From catalog imbedded in main SCHED input file. Doppler based on heliocentric frame and optical definition. Velocities: 5051.90 5051.90 5051.90 5051.90 5051.90 5051.90 5051.90 5051.90 8.931 scan and 700.258 baseline hours in setup: sess211.H128 J0927+3902 09 23 55.319213 * 09 27 03.013934 09 27 46.245428 0.29 0923+392 39 15 23.56646 * 39 02 20.85186 38 59 24.55706 0.16 * 4C39.25 /aps3/sched9.4/catalogs/sources.vlba J0927+39 GSFC 2010a astro solution 231732 Observations Doppler based on other sources. 0.167 scan and 18.750 baseline hours in setup: sess211.H128 * J1242+3751 12 40 27.034314 * 12 42 51.369077 12 43 25.855934 0.04 1240+381 38 07 25.41734 * 37 51 00.02525 37 47 18.58321 0.03 J1242+37 /aps3/sched9.4/catalogs/sources.vlba GSFC 2010a astro solution 1290 Observations Doppler based on other sources. 0.800 scan and 62.633 baseline hours in setup: sess211.H128 J1331+3030 13 28 49.657759 * 13 31 08.288051 13 31 41.716249 0.19 * 3C286 30 45 58.64061 * 30 30 32.95925 30 27 03.00073 0.17 1328+307 /aps3/sched9.4/catalogs/sources.vlba J1331+30 GSFC 2010a astro solution 276 Observations Doppler based on other sources. 0.167 scan and 0.833 baseline hours in setup: sess211.H128 J1642+3948 16 41 17.606228 * 16 42 58.809965 16 43 24.330295 0.81 * 3C345 39 54 10.81494 * 39 48 36.99400 39 47 20.92672 0.54 1641+399 /aps3/sched9.4/catalogs/sources.vlba J1642+39 GSFC 2010a astro solution 52595 Observations Doppler based on other sources. 0.236 scan and 18.792 baseline hours in setup: sess211.H128 The solar corona can cause unstable phases for sources too close to the Sun. SCHED provides warnings at individual scans for distances less than 10 degrees. The distance from the Sun to each source in this schedule is: Source Sun distance (deg) J1243+4043 92.0 4C39.25 57.0 J1242+3751 93.4 3C286 105.8 3C345 117.1 Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes that the Sun will cause amplitude reductions on the longest VLBA baselines at a solar distance of 60deg F^(-0.6) where F is in GHz. For common VLBI bands, this is: 327 MHz 117. deg 610 MHz 81. deg 1.6 GHz 45. deg 2.3 GHz 36. deg 5.0 GHz 23. deg 8.4 GHz 17. deg 15.0 GHz 12. deg 22.0 GHz 9. deg 43.0 GHz 6. deg